package com.yykj.tencent.im.server.utils;

import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneOffset;

/**
 * 时间戳
 */
public class TimestampUtil {

    /**
     * 获取到毫秒级时间戳
     * @param localDateTime 具体时间
     * @return long 毫秒级时间戳
     */
    public static long toEpochMilli(LocalDateTime localDateTime){
        return localDateTime.toInstant(ZoneOffset.of("+8")).toEpochMilli();
    }

    /**
     * 毫秒级时间戳转 LocalDateTime
     * @param epochMilli 毫秒级时间戳
     * @return LocalDateTime
     */
    public static LocalDateTime ofEpochMilli(long epochMilli){
        return LocalDateTime.ofInstant(Instant.ofEpochMilli(epochMilli), ZoneOffset.of("+8"));
    }

    /**
     * 获取到秒级时间戳
     * @param localDateTime 具体时间
     * @return long 秒级时间戳
     */
    public static long toEpochSecond(LocalDateTime localDateTime){
        return localDateTime.toEpochSecond(ZoneOffset.of("+8"));
    }

    /**
     * 秒级时间戳转 LocalDateTime
     * @param epochSecond 秒级时间戳
     * @return LocalDateTime
     */
    public static LocalDateTime ofEpochSecond(long epochSecond){
        return LocalDateTime.ofEpochSecond(epochSecond, 0,ZoneOffset.of("+8"));
    }

}
